# Hierarchical Profiler

- Einführung
- Installation/Konfiguration
  - Anforderungen
  - Installation
  - Laufzeit-Konfiguration
- Vordefinierte Konstanten
- Beispiele
- Xhprof Funktionen
  - xhprof_disable — Stops xhprof profiler
  - xhprof_enable — Start xhprof profiler
  - xhprof_sample_disable — Stops xhprof sample profiler
  - xhprof_sample_enable — Start XHProf profiling in sampling mode

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